About

paybonuscalc.com is a set of free calculators and spreadsheets for everyday money questions: how much a 13th month pay or aguinaldo will be, what lands in your account after tax, how to split a budget, when a debt will be paid off, or who buys a gift for whom.

How the numbers are made

• Each calculator follows the official rule for its country and year (for example Brazil's 2026 INSS and income tax tables, Mexico's 2026 UMA, Peru's minimum wage from October 2026) and lists its sources on the page.
• We check each one against worked examples published by official or established sources before it goes live.
• Results are estimates. Payslips can differ because of overtime, commissions or company rules, and each page says so.

Who we are

The site is run by one person in Seoul, South Korea, with help from AI tools for writing code and text. Every page is reviewed before it is published. We are not a bank, employer, tax advisor or law firm, and nothing here is financial, tax or legal advice.

How the site is paid for

The calculators are free. The site may show ads, and some pages link to our paid spreadsheet templates on Gumroad, which are clearly marked.

소개 (한국어)

서울에서 한 사람이 운영하는 무료 계산기 사이트입니다. 전기요금, 이자, 가계부, 사주 도구와 해외 급여·보너스 계산기를 만듭니다. 코드와 글은 AI 도구의 도움을 받아 만들고, 공개 전에 공식 자료의 예시와 대조해 확인합니다.